AlMgMn alloy product with improved corrosion resistance

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United States of America

PATENT NO 12024765
SERIAL NO

17275669

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Abstract

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The invention relates to a method for manufacturing an aluminum alloy sheet, wherein an aluminum alloy is prepared with the following composition, in wt %: Mg: 4.0-5.2, Mn: 0.40-1.0, Zn: 0.15-0.40, at least one element selected from Ti, Cr, Cu and Zr, the content of the element, if selected, being 0.01-0.15 for Ti, 0.05-0.25 for Cr, 0.02-0.25 for Cu, 0.05-0.25 for Zr, Fe: <0.40, Si: <0.40, other elements or impurities <0.05 each and <0.15 in total, the remainder being aluminum. A rolling plate is cast by vertical semi-continuous casting, and said optionally homogenised plate is hot-rolled in two successive stages to obtain a sheet. The sheets obtained by the method according to the invention are advantageous, in particular for shipbuilding, since they demonstrate, after being exposed for 7 days to a temperature of 100° C., a weight loss of less than 15 mg/cm2 during a corrosion test according to the ASTM G67 standard.

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Patent Owner(s)

Patent OwnerAddress
CONSTELLIUM ISSOIRE63500 ISSOIRE
CONSTELLIUM ROLLED PRODUCTS RAVENSWOOD LLCP O BOX 68 859 CENTURY ROAD ROUTE 2 SOUTH RAVENSWOOD WV 26164

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Davo, Gutierrez Maria Belen Coublevie, ES 3 3
Ledoux, Marine Grenoble, FR 3 0
Warner, Timothy Corenc, FR 45 531

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